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B. F. ORTMAN. AGEAR WHEEL.

Patented Oct. 30, 1883.-

UNITED STATES;

YPATENT OFFICE.

EAENIM F. OETMAN, OF BUFFALO, AssrGNoE OF ONE-HALF To GEORGE URBAN, JE.,OF oHEEK'rOwAGA, NEW YORK.

'GEAR-WHEEL.

SPECIFICATION forming part ofV Letters Patent'No. 287,711, dated OctoberB, 1883. Application filed July 10,1283. (No model.) I

To @ZZ whom'it may concern Be it known that I, BARNIM F. ORTMAN,.of

vthe city of Buffalo, in the, county of Erie and State of New York, haveinvented new and useful Improvements. in Gear-Wheels, of whi ch thefollowing is a specification.

The object of this invention is to produce a noiseless gear-wheel whichcan be constructed at comparatively small expense, and which possessessufficient strength to enable it to be used with safety in machines inwhich considerable power is transmitted by the wheel-for instance, inroller-mills employed in the manufacture of our, hoisting-machines, andthe like.

p Heretofore it has been proposed to construct noiseless gear-wheels ofleather, or of paper or paper-board; but such wheels do not possess therequisite degree of strength to render them capable of use in heavymachinery, and they do not last long even in light machinery. To rendersuch wheels more durable, it has been proposed to employ metallic platesbetween the plates of paper or leather; but this construction isobjectionable, because the narrow metallic plates wear rapidly,producing aiine metallic dust, which cuts and wears the intermediatelayers of paper or leather and soon destroys the wheel.

In my improved wheel these difficulties are overcome; and my inventionconsists of the improved wheel, which will be yhereinafter fully setforth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional elevation of myimproved gearwheel and' an ordinary cast pinion meshing therewith. Fig.2 is a sectional elevation of my improved gear-wheel at right angles toFig. 1. Fig. 3 is a fragmentary, inside elevation ofthe washer.

Like letters of reference refer to like parts in the several figures.

A represents the body of my improved gearwheel, which is composed oflayers of vulcanl cast-iron, and the hub b is secured to the shaftY b bya key or other suitable device.

C represents a metallic washer, which is {itted against the oppositeside of the body A, and which surrounds the hub b.

The disk B, body A, and washer C are 'sevcured together by screw-boltsd, which pass through openings in the washer C and body A, and aretapped into screw-threaded openings in the disk B.

In constructing the body A a suitable number of disks of vulcanized berare employed, each having -stamped or cut in it a central opening, oftheproper size to it snugly around the hub b of the wheel to beconstructed. The

several disks are then glued or cemented together and secured betweentemplets provided in their peripheries with teeth of the same form whichare to be formed on the wheel. The templets are secured to the body A byscrew-bolts'passing through the openings g, which have been previouslydrilled through the body composed of said disks. One of said templets isprovided with a hub which fits in the central opening of the body. Thelatter, secured between the templets, isl placed in a suitable press todry. Upon being removed from the press it is placed in a gear-cuttingmachine, by which the cogs or teeth are out in the face of the body inthe same manner in which such teeth are cut in metallic wheels.

The templets are then removed, and the body is secured between the diskBrand washer U by the bolts d, the body being preferably also cementedto said disk and washer,

The teeth of the body A are made somewhat first put in use, theshrinkage can be taken up from time to time by (tightening the bolts d.

rlhe vulcanized fiber of which the body A is lconstructedis very strong,hard, and durable,

and wears evenly and smoothly, and does not swell or warp .wheiexposedto moisture,`in |.ior-m than that of rollerswhich are'driven by 3o whichrespects it differs from paper, paperboard, leather, rawhide, andsimilar material.

In order to cheapen the wheel, without materially reducing its desirablequalities, layers of `junk or Manila board z' may be placed between thelayers of vulcanized ber z", as represented in Fig. l.

The disk B and washer C are constructed on their inner sides with radialribs k, which imbed themselves in the adjacent layers of vnleanizedfiber or junk-board and assist in securing the body A between the diskand washer.

When the teeth of the body A have become worn to such an extent as torender a renewal of this part desirable, this is readily accomplished byremoving the washer C and body A from the hub b and inserting` a newbody, A, in the place of the one so renewed, thereby enabling theworkingfaee of the wheel to be renewed without removing the hubb fromthe shaft.

y improved gear-wheel is produced at comparatively small expense, and isadapted for use in all cases in which a noiseless gear is desirable. Itis particularly advantageous in roller-mills for manufacturing iiour,because of its even and uniform working, whereby the operation of therollers is rendered more uni` metallicgear-wheels, and'because of theabsence of noise, which renders this gear as desirable in this respectas a belt-driving mechanism, while it possessesthe great advantage of apositive movement over the belt-driving mechanism, so that it retainsthe important advantage of a gear mechanism which positively maintainsthe proper differential speed of the rollers, while doing away with theobjectionable noise created by ordinary geardriving mechanism.

. I claim as my invention- 1. A gear-wheel having anon-metallicnoiseless body, A, constructed wholly or partially of vulcanized fiber,and having cogs or teeth formed in said body, substantially as setforth.

2. In a gear-wheel, the combination, with a body, A, constructed whollyor partially of layers of vulcanized ber cemented together, and havingeogs or teeth formed in said body, of metallic disks B and C, providedon their inner sides with ribs K, and secured to opposite sides of saidbody A, substantially as set BARNIM F. ORTMAN.

Iforth.

Vitnesses:

CHAs. F. GEYER, J No. J. BONNER.

